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  1. dave9

    good night I am just checking if anyone is familiar with the Kicker Amphitheatre box 40ik5bt

    If you can't bother to state why, then why should it matter to anyone else? Does this seem harsh? You waste your time and ours if you don't get to the point.
  2. dave9

    Perfboard replacement

    What you could use as a "household-type replacement" would depend on what you have lying around and what the circuit requirements are. Obviously on perfboard, you aren't expecting a ground plane or for it to heatsink anything, and probably not any surface mount components. In that case...
  3. dave9

    Rhino air hockey

    If I were there to get a better look and probe, probably but you're not giving me enough info that I can be confident that I wouldn't tell you wrong and cause damage.
  4. dave9

    What makes a successful engineer?

    There are desirable engineering jobs and there are the rest, depending on what you consider desirable. Your question seems lazy like you don't want to put forth much effort, or else you would have written more than a mere 9 words on your own topic. That would be a mistake if you want to be an...
  5. dave9

    Rhino air hockey

    I still don't understand what you're asking. You may need to elaborate more and indicate the wires on the pictures. Don't you have the old display module so you can compare how it was hooked up and duplicate that on the new one?
  6. dave9

    Power Supply

    I'm sure you're willing to put forth more effort looking than others would but briefly what i found is this is an old school linear 120VAC to 12VDC bench battery-replacement type supply with a TO3 pass transistor on the back. It should not be hard to reverse engineer this with just some good...
  7. dave9

    Small print

    Complain to the manufacturer that the components should be in labeled bags if there are any that can be confused with one another.
  8. dave9

    Rhino air hockey

    ^ It would be easy to say yes, it seems right to connect it like you think the old one was connected, but if you want to be sure then you need to assess it more and/or tell us and provide pics. If there is a spec for the voltage it uses then you can measure the voltage on the wires you plan...
  9. dave9

    Power supply output voltage

    Some PSU require a load, do you have it powering one?
  10. dave9

    Replace old transformer with rectifier bridge

    ^ I recommend pursing your mad scientist experiments using a much lower voltage than 220VAC mains, but first fixing the amp the way we suggested so you have music like Franz Reichelt's video does:
  11. dave9

    Replace old transformer with rectifier bridge

    ^ Finding exactly the right size replacement transformer that will solder onto the space on the PCB could take a very long time and you may never find it, and it may be very expensive including shipping, compared to the low value of the speaker amp. 12VDC output AC/DC wall adapters on the...
  12. dave9

    JVC RX-450 silent

    You have not stated anything that indicates to me that if there was a power surge that it didn't enter via the power cable. Everything has its own tolerance to voltage spikes, not frying other components is good, not evidence. Further a fuse may not blow before a transistor or diode fails open...
  13. dave9

    Replace old transformer with rectifier bridge

    It might be time for a PC speaker upgrade with a new amp in them. I could see that burning up the transformer just trying to get more sound out of it since it is only capable of about 1W with a tail-wind. They say it's the first watt that counts but that one, THD high to get that far.
  14. dave9

    Are those blown capacitors?

    You should plan on replacing the POT, but in some cases I have managed to get some working again. Assuming the crude stamped metal shell design with gaps, try spraying some contact cleaner in and rotating it back and forth several times before the cleaner evaporates. Next step is take the pot...
  15. dave9

    Temp sensor and PWM for 12v fan-2 wire or 4 wire?

    There are other temperature controlled fans, but the prices are significantly higher. That one I linked, at retail it probably sold for $35 (due to the metal frame). You can see some others at electronic supply houses like Digikey...
  16. dave9

    Temp sensor and PWM for 12v fan-2 wire or 4 wire?

    I'm not clear on exactly what you're trying to do. Your factory air ductwork can be sealed with (get ready for it) duct tape. However these axial fans are not capable of much static pressure. The thicker they are, the more the static pressure rises but still, if you intend to use the existing...
  17. dave9

    Temp sensor and PWM for 12v fan-2 wire or 4 wire?

    ^ You can have durable or efficient, but keep in mind that the 0.5A rating for the NMB is probably the stall current, not the average consumption. What you linked is 92mm x 25mm and 38CFM, you will need more of them. Being sleeve bearing they should also be mounted vertically. You might...
  18. dave9

    Temp sensor and PWM for 12v fan-2 wire or 4 wire?

    yes The lower limit on the fan temperature range doesn't necessarily mean it won't spin until that temperature is reached, rather that it won't start ramping up in speed until it hits that range.
  19. dave9

    Does anyone know the name of this AC power cord adaptor?

    Come to think of it, that looks similar to my mains powered smoke detector plug, so not in-chassis... leave it to me to make a statement then prove myself wrong, lol.
  20. dave9

    Temp sensor and PWM for 12v fan-2 wire or 4 wire?

    The thermostat module operates off 12V, you have 12V going to it, and 12V out going to the fans is switched by the relay on the module, based on the temperature you set.. The fans grounds would be wired together with the power supply ground going to the thermostat module. I don't know how much...
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